CN116633124A - Constant-current voltage stabilizing circuit suitable for alternating current and direct current - Google Patents
Constant-current voltage stabilizing circuit suitable for alternating current and direct current Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/062—Avoiding or suppressing excessive transient voltages or currents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The application relates to a constant current voltage stabilizing circuit suitable for alternating current and direct current, which comprises a constant current module and a bidirectional TVS diode which are sequentially connected in series, wherein: the constant current module comprises a resistor and a diode, and the resistor and the diode are connected in series; and the two ends of the bidirectional TVS diode are output ends of the constant-current voltage stabilizing circuit. The application adopts a simple circuit and a low-cost low-voltage transistor, can well resist surge impact of several kilovolts, and protects a back-end circuit. The stable various voltage outputs required by the intelligent small household appliances can be realized only by changing the parameters of the TVS diode of the core device according to actual demands, and the intelligent small household appliances become small-power high-voltage step-down power supplies for outputting different powers.
Description
Technical Field
The application relates to the field of power supply circuits, in particular to a constant-current voltage stabilizing circuit suitable for alternating current and direct current.
Background
In actual research and production, research engineers are encountering more and more devices and system units that require only low voltage and high level current power. Typical examples include, but are not limited to, the display of measurement data or timers, microcontroller-based measurement systems, and simple open and closed loop controls, etc. Similar examples also include devices that need to access a wireless network, such as smart meters that read data over a wireless network, network devices that access the internet of things, and the like.
Conventional power supplies have a number of disadvantages in such low power ranges, not only requiring a lot of space but also being expensive if transformer or switching power supply solutions are employed.
The common resistive-capacitive voltage reduction circuit essentially refers to a practical circuit scheme mainly comprising capacitive voltage reduction (capacitive reactance constant current i=u/Z) and various protection resistors connected in series and parallel. The resistive-capacitive voltage reduction is a circuit that limits the maximum operating current by using the capacitive reactance generated by the capacitor under an ac signal of a certain frequency. In a rc buck circuit, the capacitor actually functions to limit the current and dynamically distribute the voltage across the capacitor and load, which is significantly less costly than a scheme using a transformer for buck.
The resistance-capacitance voltage reduction circuit has the advantages of simple design, low cost, small volume, convenient assembly and the like, is widely applied to the fields of panel control of small household appliances, small-power LEDs, hotel gate control, ammeter and the like, and is generally only suitable for small-power and small-current loads (recommended smaller than 100 mA). Such as an electric fan, a milk warmer, a yogurt machine, an egg cooker, a hair puller, etc.
However, in long-term product practice, there are often problems with resistor-capacitor voltage reduction, for example, as the capacitor's lifetime increases, the capacitor's capacity will decrease significantly, causing power failures. The selected capacitor is the preferred consideration of most designers, but the special voltage-reducing capacitor is expensive and has huge volume, and the advantages (small volume) of the resistance-capacitance voltage-reducing circuit are completely abandoned, so that no special capacitor is used in mass resistance-capacitance voltage-reducing products on the market. Moreover, the life of the product with the resistance-capacitance voltage reduction is not long, the life is more than 2 years and 3 years, the life is less than half 1 year, the attenuation of the capacitor is severe, and the product is damaged.
The reliability of the high-voltage CBB capacitor (polypropylene capacitor) commonly used for resistance-capacitance voltage reduction is not very different from the manufacturing process. The attenuation of capacitors including an X2 capacitor (capacitor for X2 suppression of electromagnetic interference of a power supply) and a dedicated step-down capacitor is unavoidable. How to protect the capacitor from breakdown for as long as possible is an essential protection measure to avoid a reduction in the capacitor capacity, which is why the pi-type LCR protection circuit in front of the main capacitor is the biggest reason why it cannot be seen as being removed without use.
As shown in figure 1, the capacitor voltage-reducing circuit is a relatively simple capacitor voltage-reducing circuit, is very favored by consumer factories through simple improvement, and has low cost. When the circuit is tested in a laboratory, people can feel stable enough, but in the application of mass folk consumption, the circuit is extremely easy to cause problems, and the problems can be rare, such as a nixie tube for displaying temperature can be jumped out, a display control unit is dead, and the like, the result of disassembly research is sometimes caused by insufficient power supply, but the fault is extremely difficult to reappear, the fault appears randomly (such as wet weather, high-temperature weather, and the like), and the product problems caused by the resistance-capacitance voltage reduction power supply circuit can be layered endlessly, for example, the problems of no-accident burnout, burnthrough phenomenon, burnt and baked black PCB board, burst of a voltage stabilizing tube, breakdown of a later-stage singlechip, and the like are frequently caused.
In view of the above related art, the inventor considers that the low-cost electronic transformer commonly found in the market is difficult to carry out various electromagnetic compatibility tests of lightning surge, and the conventional high-voltage drop circuit has the problem of outstanding contradiction between performance and reliability.
Disclosure of Invention
In order to obtain a voltage-reducing power supply with higher performance and reliability, the application provides a constant-current voltage-stabilizing circuit suitable for alternating current and direct current.
The application provides a constant current voltage stabilizing circuit suitable for alternating current and direct current, which adopts the following technical scheme:
the constant current voltage stabilizing circuit suitable for alternating current and direct current comprises a constant current module and a bidirectional TVS diode which are sequentially connected in series, wherein:
the constant current module comprises a resistor and a diode, and the resistor and the diode are connected in series;
and the two ends of the bidirectional TVS diode are output ends of the constant-current voltage stabilizing circuit.
Optionally, the diode is a rectifying diode.
Optionally, the diode is a unidirectional TVS diode.
Optionally, the diode is a bidirectional TVS diode.
Optionally, the constant current module is further connected in series with a rectifying diode.
Optionally, the output end of the constant current voltage stabilizing circuit is also connected in series with a rectifier diode.
Optionally, the output end of the constant current voltage stabilizing circuit is also connected with a capacitor in parallel.
Optionally, the output end of the constant current voltage stabilizing circuit is also connected with a voltage stabilizing circuit in parallel.
Optionally, the voltage stabilizing circuit includes a resistor and a voltage stabilizing diode connected in series in sequence, and two ends of the voltage stabilizing diode are output ends of the voltage stabilizing circuit.
Optionally, the voltage stabilizing circuit includes triode, resistor and zener diode, triode collecting electrode and resistor one end are as the voltage stabilizing circuit input, the triode base is connected the resistor other end and zener diode negative pole, the triode projecting pole is as the voltage stabilizing circuit output, zener diode positive pole ground connection.
In summary, the application adopts a simple circuit and a low-cost low-voltage transistor, can well resist surge impact of several kilovolts, and protects the back-end circuit. The stable various voltage outputs required by the intelligent small household appliances can be realized only by changing the parameters of the TVS diode of the core device according to actual demands, and the intelligent small household appliances become small-power high-voltage step-down power supplies for outputting different powers.
Drawings
Fig. 1 is a schematic diagram of a capacitor step-down circuit in the related art.
Fig. 2 is a schematic diagram of a constant current voltage stabilizing circuit according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a constant current voltage stabilizing circuit according to another embodiment of the present application.
Fig. 4 is a schematic diagram of a constant current voltage stabilizing circuit according to another embodiment of the present application.
Fig. 5 is a schematic diagram of a voltage stabilizing circuit according to an embodiment of the present application.
FIG. 6 is a schematic diagram of an embodiment of the present application incorporating rectifying and voltage stabilizing circuits.
Fig. 7 is a schematic diagram of a voltage stabilizing circuit according to another embodiment of the present application.
Fig. 8 is a schematic diagram of a rectifier and regulator circuit according to another embodiment of the present application.
Detailed Description
The transient voltage suppression diode (Transient Voltage Suppressor) is a high-efficiency protection device in the form of a diode, simply called TVS diode. When the two poles of the TVS diode are impacted by reverse transient high energy, the high resistance between the two poles can be changed into low resistance at the speed of the magnitude of minus 12 seconds of 10, and the surge power of thousands of watts is absorbed, so that the voltage clamp between the two poles is positioned at a preset value, thereby effectively protecting precise components in an electronic circuit from being damaged by various surge pulses.
In the traditional voltage-stabilizing diode power supply system, because the dissipation power of the voltage-stabilizing diode is smaller, the patch package is usually about 100mW, the voltage-stabilizing diode with the maximum 1-2w adopts a metal shell package, the price is higher, the occupied area of the PCB is large, and small household appliances are influenced by volume and cost and basically cannot be selected. To output more practical power using inexpensive low-power zener diodes, high-power transistors and the like must be used for current spreading, which in turn greatly increases the overall cost of the system. While TVS diodes have been popular as novel semiconductors for the last decade in various protection and protection circuits, their price has also fallen to the level of common low power zener diodes.
The instantaneous absorption pulse power of the TVS diode generally reaches more than 5000W, and the continuous dissipation power is far more than that of a common voltage-stabilizing diode, so that the TVS diode with breakdown voltage meeting the requirement can be used, and the practical low power (about 0.5-2W for example) can be directly output on the basis of ensuring the reliability.
Low power supplies are often susceptible to problems such as ESD, surge testing, etc. during authentication. In the scheme of the embodiment of the application, the problems of ESD, surge test and the like in the authentication are basically solved by adopting the TVS diode.
The application adopts TVS diode as core device, designs a small-power high-voltage step-down power supply which satisfies the requirements of intelligent small household appliances, is more stable, can output various voltages and can output different powers, is mainly applied to the small-power supply, and is different from the traditional power supply system.
Embodiments of the present application applicable to a constant current voltage stabilizing circuit for ac/dc power are described in detail below with reference to the drawings of the specification, but the embodiments should not be construed as limiting the application.
As shown in fig. 2, the embodiment of the application provides a constant-current voltage stabilizing circuit suitable for ac/dc power, which comprises an eleventh resistor R11, a rectifier diode D and an eleventh bidirectional TVS diode TVS11 connected in series in sequence, wherein an anode of the rectifier diode D is connected with the eleventh resistor R11, a cathode of the rectifier diode D is connected with the eleventh bidirectional TVS diode TVS11, and two ends of the eleventh bidirectional TVS diode TVS11 are output ends of the constant-current voltage stabilizing circuit.
The transient power of the TVS diode generally exceeds 1500W and can even reach 5000W, and the dissipation power PD is generally above 5W and is far greater than the level (0.1W-1W) of a common voltage stabilizing tube. For low-power consumption application of the intelligent electrical appliance, a current-expanding circuit is not needed, and low-power output (such as less than 2W) with lower voltage can be obtained directly from the TVS diode in a parallel voltage stabilizing mode; and simultaneously, external transient interference can be effectively restrained. In this embodiment, the high-power characteristic of the TVS is utilized, and the bidirectional TVS diode is used to directly replace the voltage stabilizing tube to perform voltage stabilization, so as to perform first-stage and preliminary parallel voltage stabilization, and simultaneously suppress transients.
As shown in fig. 3, an embodiment of the present application provides a constant current voltage stabilizing circuit suitable for ac/dc power, which includes a twenty-first resistor R21, a unidirectional TVS diode TVSD and a twenty-first bidirectional TVS diode TVS21 connected in series in sequence, wherein an anode of the unidirectional TVS diode TVSD is connected to the twenty-first resistor R21, a cathode of the unidirectional TVS diode TVSD is connected to the twenty-first bidirectional TVS diode TVS21, and two ends of the twenty-first bidirectional TVS diode TVS21 are output ends of the constant current voltage stabilizing circuit.
In this embodiment, full-wave or half-wave rectification of alternating current is performed by using the unidirectional conduction characteristic of the TVS diode, so that one or 4 common alternating current rectifying tubes are omitted, and external transient interference can be greatly suppressed.
As shown in fig. 4, the embodiment of the application provides a constant current voltage stabilizing circuit suitable for ac/dc power, which includes a thirty-first resistor R31, a thirty-second TVS diode TVS32 and a thirty-first TVS diode TVS31 connected in series in sequence, wherein two ends of the thirty-first TVS diode TVS31 are output ends of the constant current voltage stabilizing circuit. It will be appreciated that from a physical and cost perspective, the thirty-first bi-directional TVS diode TVS31 and the thirty-second bi-directional TVS diode TVS32 may also be selected from the same types of devices, which greatly simplifies the conventional high voltage step-down circuit.
In the embodiment, the breakdown characteristic of the bidirectional TVS diode is utilized to step down and stabilize the alternating current, so that the defects of heavy, expensive and heating of an iron core transformer and the like are completely avoided, and meanwhile, the external transient interference can be effectively restrained.
One can approximately consider: the thirty-first bidirectional TVS diode TVS32 and the thirty-first resistor R31 form a constant current source, and the thirty-first bidirectional TVS diode TVS31 forms a voltage stabilizing source. The constant current voltage stabilizing circuit is suitable for high-voltage direct current input and also suitable for high-voltage alternating current input, and Vin is alternating current input, such as 220V of mains supply in the embodiment.
Because of the breakdown characteristics of the TVS diodes, VAB is substantially constant, when powered up, the power source reaches across the thirty-two bi-directional TVS diode TVS32 through the load on the output VO, and when the voltage across the VAC exceeds the breakdown voltage of the thirty-two bi-directional TVS diode TVS32, the thirty-two bi-directional TVS diode TVS32 will act to create an avalanche breakdown effect, allowing the voltage across the VAC to drop rapidly. Because the breakdown voltage of the TVS diode fluctuates substantially within a small range, the voltage across the thirty-first resistor R31 also fluctuates substantially within a small range, and VCB is also clamped around the breakdown voltage of the thirty-first bidirectional TVS diode TVS 31. If either the load is empty or light, the total current I flows substantially entirely through the thirty-first bidirectional TVS diode TVS31, and the current I1 thereabove is substantially equal to the total current I. In practical application, the output terminal VO has a load, the total current I is split, and the split current I2 is formed at the load, so that the actual voltage of the VCB is slightly smaller than the breakdown voltage of the thirty-first bidirectional TVS diode TVS31, which approximates to the voltage stabilizing effect. Through the combination of a resistor and two TVS diodes, a high voltage drop to a suitable preset range, such as 220V down to within 100V, can be achieved.
Because the voltage across VAB is substantially constant, the current through thirty-first resistor R31 is also substantially constant and the circuit configuration looks like a basic dc regulated power supply as a whole, except that the bi-directional TVS diode is used and is also suitable for ac step-down.
It will be appreciated that, due to the large voltage drop across the thirty-first bi-directional TVS diode TVS31 (about 30-100V), the total current I flows through the thirty-first bi-directional TVS diode TVS31 entirely when no load or light load is present, and if a large total current I is set, a large amount of heat is generated, which may impair the life of the circuit, and if a small total current I is set, a circuit scheme is not practical (the output power is too small). Considering the power consumption derating (chip core temperature rise) of the current silicon process semiconductor, the total current I can be limited to 1-20mA which is practical, so that the output power is equivalent to that of a resistance-capacitance step-down power supply in the prior art after the step-down of the circuit provided by the embodiment of the application, and the idle power consumption of the whole circuit is relatively low, for example, the idle power consumption of TVS (transient voltage suppression) can be limited within the range of 2W when the current is 20 mA.
The circuit maintains the constant current characteristic of resistance-capacitance voltage reduction, but uses the mounting semiconductor and the mounting welding process which are small in size and high in reliability to replace the high-voltage capacitor and the plug-in welding production process which are large in size and low in reliability, and realizes the low-power voltage-stabilizing power supply with lower cost and better reliability for high-voltage reduction.
It will be appreciated that the approximately regulated source of the thirty-first bi-directional TVS diode TVS31 is in parallel relationship to the load, but that the total current flowing through the thirty-first resistor R31 is constant, and is substantially determined by the breakdown voltages of the two TVS diodes and the resistance of the thirty-first resistor R31. The maximum current I2 of the output VO load is slightly smaller than the total current I, when I2 becomes larger (load is heavier), I1 becomes smaller, the loop power consumption of the thirty-first bidirectional TVS diode TVS31 is reduced (so that in actual use, the load is not suggested to fluctuate too much, and the loss of the TVS2 is prevented from becoming uncertain), at this time, the voltage at both ends of the load changes along with the load, and if the load needs to have a relatively stable voltage, appropriate rectifying and stabilizing measures need to be added.
As shown in fig. 5, the voltage stabilizing circuit includes a forty-two resistor R42 and a forty-two voltage stabilizing diode D42 connected in series in sequence, where two ends of the forty-two voltage stabilizing diode D42 are output ends of the voltage stabilizing circuit, and are used for connecting a load. It will be appreciated that in this embodiment, since the added voltage stabilizing circuit is only suitable for direct current, the scheme is only suitable for direct current, and if it is to be used in an alternating current scenario, full-wave or half-wave rectification may be added before or after voltage reduction and stabilization.
As shown in fig. 6, half-wave rectification is added before the step-down voltage stabilization, namely: a forty-first rectifying diode D41 is connected in series between the forty-first resistor R41 and the forty-second bidirectional TVS diode TVS 42. The output end of the constant current voltage stabilizing circuit can be connected in parallel with a capacitor C41. In the embodiment, a low-cost half-wave rectification is added, so that alternating current can be changed into direct current, 3 diodes can be omitted, and the cost is saved.
As shown in fig. 7, the voltage stabilizing circuit includes a fifty-first triode Q51, a fifty-second resistor R52 and a fifty-second voltage stabilizing diode D52, wherein a collector of the fifty-first triode Q51 and one end of the fifty-second resistor R52 are used as input ends of the voltage stabilizing circuit, a base of the fifty-first triode Q51 is connected with the other end of the fifty-second resistor R52 and a cathode of the fifty-second voltage stabilizing diode D52, an emitter of the fifty-first triode Q51 is used as output ends of the voltage stabilizing circuit, and an anode of the fifty-second voltage stabilizing diode D52 is grounded. It will be appreciated that in this embodiment, since the added voltage stabilizing circuit is only suitable for direct current, the scheme is only suitable for direct current, and if it is to be used in an alternating current scenario, full-wave or half-wave rectification may be added before or after voltage reduction and stabilization.
As shown in fig. 8, half-wave rectification is added after the step-down voltage stabilization, namely: and a fifty-first rectifying diode D51 is connected in series with the output end of the constant-current voltage stabilizing circuit. Because the fifty-first bidirectional TVS diode TVS51 and the fifty-second bidirectional TVS diode TVS52 are substantially ac divided, the fifty-first rectifying diode D51 is required to rectify, and the fifty-first transistor Q51 is used as a simple voltage stabilizing circuit, so that the output voltage is relatively stable; in addition, a capacitor (not shown in the figure) may be connected in parallel to two ends of the fifty-second zener diode D52, so as to form an electronic filter, which can greatly reduce the ripple wave of the half-wave rectification.
The circuit of the embodiment of the application can cover common application, has higher cost performance and strong stability, greatly improves the life cycle of products, satisfies EMC, can realize various power and voltage output, and has small occupied PCB area, high reliability and the like.
The embodiment of the application is suitable for replacing a resistance-capacitance voltage reduction circuit and is applied to a low-power non-isolated voltage reduction power supply, such as a standby power supply and the like; furthermore, the following scenarios may also apply:
household or commercial intelligent appliances provide low standby and low power commercial power supply sources for the household or commercial intelligent appliances;
micro devices in small spaces, which are sensitive to the volume of the power supply, require very small volumes, such as underwater robot sensors;
a power supply and a product which need to be exported abroad and are required to be authenticated by UL, CE, CCC and the like;
in the occasion with high reliability requirement, long service life of the product is required; the embodiment of the application does not need high-voltage electrolytic capacitors, X capacitors and the like, but adopts TVS diodes, so that the service life is long;
extensions can be used to drive common high power loads such as band relays, thyristors, etc.;
communication application: the simplest application of voltage reduction and voltage stabilization of alternating current is needed;
for cost sensitive applications, a lower cost, smaller volume, more reliable and more powerful power supply is provided than a resistive-capacitive voltage reduction.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The specific working process of the system, the device and the unit described above may refer to the corresponding process in the foregoing method embodiment, and will not be described herein.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. The integrated units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or partly in the form of a software product or all or part of the technical solution, which is stored in a storage medium, and includes several instructions for causing a computer device or processor to execute all or part of the steps of the method according to the embodiments of the present application.
The foregoing examples are only for the purpose of describing the technical scheme of the present application in detail, but the description of the foregoing examples is only for aiding in the understanding of the method of the present application and the core idea thereof, and should not be construed as limiting the present application. Variations or alternatives, which are easily conceivable by those skilled in the art, are included in the scope of the present application.
Claims (10)
1. The constant-current voltage stabilizing circuit suitable for alternating current and direct current is characterized by comprising a constant-current module and a bidirectional TVS diode which are sequentially connected in series, wherein:
the constant current module comprises a resistor and a diode, and the resistor and the diode are connected in series;
and the two ends of the bidirectional TVS diode are output ends of the constant-current voltage stabilizing circuit.
2. The constant current voltage regulator circuit for ac/dc power according to claim 1, wherein: the diode is a rectifier diode.
3. The constant current voltage regulator circuit for ac/dc power according to claim 1, wherein: the diode is a unidirectional TVS diode.
4. The constant current voltage regulator circuit for ac/dc power according to claim 1, wherein: the diode is a bi-directional TVS diode.
5. The constant current voltage regulator circuit for ac/dc power according to claim 4, wherein: the constant current module is also connected in series with a rectifier diode.
6. The constant current voltage regulator circuit for ac/dc power according to claim 4, wherein: and the output end of the constant current voltage stabilizing circuit is also connected in series with a rectifier diode.
7. The constant current voltage regulator circuit for ac/dc power according to claim 5 or 6, wherein: the output end of the constant current voltage stabilizing circuit is also connected in parallel with a capacitor.
8. The constant current voltage regulator circuit for ac/dc power according to claim 5 or 6, wherein: the output end of the constant current voltage stabilizing circuit is also connected with a voltage stabilizing circuit in parallel.
9. The constant current voltage regulator circuit for ac/dc power according to claim 8, wherein: the voltage stabilizing circuit comprises a resistor and a voltage stabilizing diode which are sequentially connected in series, and two ends of the voltage stabilizing diode are output ends of the voltage stabilizing circuit.
10. The constant current voltage regulator circuit for ac/dc power according to claim 8, wherein: the voltage stabilizing circuit comprises a triode, a resistor and a voltage stabilizing diode, wherein a collector electrode of the triode and one end of the resistor are used as input ends of the voltage stabilizing circuit, a base electrode of the triode is connected with the other end of the resistor and a cathode of the voltage stabilizing diode, an emitter electrode of the triode is used as output ends of the voltage stabilizing circuit, and an anode of the voltage stabilizing diode is grounded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310896214.0A CN116633124A (en) | 2023-07-21 | 2023-07-21 | Constant-current voltage stabilizing circuit suitable for alternating current and direct current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310896214.0A CN116633124A (en) | 2023-07-21 | 2023-07-21 | Constant-current voltage stabilizing circuit suitable for alternating current and direct current |
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| CN116633124A true CN116633124A (en) | 2023-08-22 |
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| CN202310896214.0A Pending CN116633124A (en) | 2023-07-21 | 2023-07-21 | Constant-current voltage stabilizing circuit suitable for alternating current and direct current |
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